// 请求服务器地址const String baseUrl =  'http://gcglobalcrm.atomtechnology.com.hk/crm/';// 请求连接const Map urlPath = {  'login': 'User/Login',  'logout':'User/Logout',  'getsms':"Common/GetSMSCode",  'checksms':"Common/CommitSMSCode"};// content-typeconst Map contentType = {  'json': "application/json",  'form': "application/x-www-form-urlencoded"};